| 原位生成Sialon增强Al2O3-SiC-C铁沟浇注料抗渣机理研究 |
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| 引用本文： | 顾华志,吕春燕,汪厚植,张文杰.原位生成Sialon增强Al2O3-SiC-C铁沟浇注料抗渣机理研究[J].武汉科技大学学报(自然科学版),2004,27(1):18-21. |
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| 作者姓名： | 顾华志 吕春燕 汪厚植 张文杰 |
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| 作者单位： | 武汉科技大学高温陶瓷与耐火材料湖北省重点实验室,湖北,武汉,430081 |
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| 摘 要： | 采用静态坩埚法进行了Sialon增强Al2O3-SiC-C铁沟浇注料的抗渣实验.结果表明,该种铁沟料具有比传统铁沟料更优异的抗渣性能.通过X-射线衍射和SEM分析可知,其抗渣机理为添加的Si3N4,Si与Al2O3发生原位反应生成Sialon,使材料内部结合更加紧密,并且生成的Sialon活性较高,氧化放出气体,阻止熔渣的渗入;其次,Sialon向熔渣中溶解,使熔渣成为含N的高硅玻璃,粘度增大;此外,Al2O3与熔渣的MgO反应生成MgAl2O4,形成一阻挡层,这也是Sialon增强Al2O3-SiC-C浇注料具有优异的抗渣渗透及侵蚀性能的重要原因.
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| 关 键 词： | 原位反应 Sialon Al2O3-SiC-C 铁沟浇注料 抗渣机理 |
| 文章编号： | 1672-3090(2004)01-0018-04 |
| 修稿时间： | 2003年12月27 |
Mechanism of Slag Resistance of Al2O3-SiC-C Castables for Iron Trough Strengthened by Sialon in-situ Synthesized |
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| GU Hua-zhi,LU Chun-yan,WANG Hou-zhi,ZHANG Wen-jie e Ceramics and Refractories,Wuhan University of Science and Technology,Wuhan ,China.Mechanism of Slag Resistance of Al2O3-SiC-C Castables for Iron Trough Strengthened by Sialon in-situ Synthesized[J].Journal of Wuhan University of Science and Technology(Natural Science Edition),2004,27(1):18-21. |
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| Authors: | GU Hua-zhi LU Chun-yan WANG Hou-zhi ZHANG Wen-jie e Ceramics and Refractories Wuhan University of Science and Technology Wuhan China |
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| Institution: | GU Hua-zhi,LU Chun-yan,WANG Hou-zhi,ZHANG Wen-jie e Ceramics and Refractories,Wuhan University of Science and Technology,Wuhan 430081,China) |
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| Abstract: | Experiment on slag resistance of Al_(2)O_(3)-SiC-C castables for iron trough strengthened by Sialon in-situ synthesized was carried out with static crucible method. The result shows that the developed castables yield greater slag resistance than traditional ones. The mechanism of slag resistance of the castables can be discovered by means of XRD and SEM analysis. It is concluded that the active Sialon formed during in-situ reaction gives the castables outstanding slag resistance for the gas resulting from sialon oxidation will inhibit slag penetration. Besides, the slag will turn into glass with high N content and its viscosity will further increase accordingly when Sialon is dissolved in it. In addition, MgO in slag reacting with Al_(2)O_(3) to form MgAl_(2)O_(4) will also greatly improve the slag resistance of the castables strengthened by Sialon. |
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| Keywords: | in-situ reaction Sialon Al_2O_3-SiC-C castables for iron trough mechanism of slag resistance |
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